5a95af70a2
* Added VFS helper function check_access_permissions() that combines several partially correct versions to the one true version (tm). * All but BFS (since recently) missed the S_IXOTH for root on directories, and all but packagefs missed proper group handling.
381 lines
14 KiB
C
381 lines
14 KiB
C
/*
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* Copyright 2004-2014, Haiku Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _FS_INTERFACE_H
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#define _FS_INTERFACE_H
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/*! File System Interface Layer Definition */
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#include <OS.h>
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#include <Select.h>
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#include <module.h>
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#include <disk_device_manager.h>
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#include <sys/uio.h>
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struct dirent;
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struct stat;
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struct fs_info;
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struct select_sync;
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typedef struct IORequest io_request;
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/* additional flags passed to write_stat() (see NodeMonitor.h for the others) */
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// NOTE: Changing the constants here or in NodeMonitor.h will break
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// src/kits/storage/LibBeAdapter.cpp:_kern_write_stat().
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#define B_STAT_SIZE_INSECURE 0x2000
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// TODO: this should be faded out once BFS supports sparse files
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/* passed to write_fs_info() */
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#define FS_WRITE_FSINFO_NAME 0x0001
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struct file_io_vec {
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off_t offset;
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off_t length;
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};
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#define B_CURRENT_FS_API_VERSION "/v1"
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// flags for publish_vnode() and fs_volume_ops::get_vnode()
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#define B_VNODE_PUBLISH_REMOVED 0x01
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#define B_VNODE_DONT_CREATE_SPECIAL_SUB_NODE 0x02
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct fs_volume fs_volume;
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typedef struct fs_volume_ops fs_volume_ops;
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typedef struct fs_vnode fs_vnode;
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typedef struct fs_vnode_ops fs_vnode_ops;
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typedef struct file_system_module_info file_system_module_info;
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struct fs_volume {
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dev_t id;
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partition_id partition;
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int32 layer;
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void* private_volume;
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fs_volume_ops* ops;
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fs_volume* sub_volume;
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fs_volume* super_volume;
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file_system_module_info* file_system;
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char* file_system_name;
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};
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struct fs_vnode {
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void* private_node;
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fs_vnode_ops* ops;
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};
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struct fs_volume_ops {
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status_t (*unmount)(fs_volume* volume);
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status_t (*read_fs_info)(fs_volume* volume, struct fs_info* info);
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status_t (*write_fs_info)(fs_volume* volume, const struct fs_info* info,
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uint32 mask);
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status_t (*sync)(fs_volume* volume);
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status_t (*get_vnode)(fs_volume* volume, ino_t id, fs_vnode* vnode,
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int* _type, uint32* _flags, bool reenter);
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/* index directory & index operations */
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status_t (*open_index_dir)(fs_volume* volume, void** _cookie);
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status_t (*close_index_dir)(fs_volume* volume, void* cookie);
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status_t (*free_index_dir_cookie)(fs_volume* volume, void* cookie);
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status_t (*read_index_dir)(fs_volume* volume, void* cookie,
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struct dirent* buffer, size_t bufferSize, uint32* _num);
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status_t (*rewind_index_dir)(fs_volume* volume, void* cookie);
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status_t (*create_index)(fs_volume* volume, const char* name, uint32 type,
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uint32 flags);
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status_t (*remove_index)(fs_volume* volume, const char* name);
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status_t (*read_index_stat)(fs_volume* volume, const char* name,
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struct stat* stat);
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/* query operations */
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status_t (*open_query)(fs_volume* volume, const char* query, uint32 flags,
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port_id port, uint32 token, void** _cookie);
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status_t (*close_query)(fs_volume* volume, void* cookie);
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status_t (*free_query_cookie)(fs_volume* volume, void* cookie);
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status_t (*read_query)(fs_volume* volume, void* cookie,
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struct dirent* buffer, size_t bufferSize, uint32* _num);
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status_t (*rewind_query)(fs_volume* volume, void* cookie);
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/* support for FS layers */
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status_t (*all_layers_mounted)(fs_volume* volume);
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status_t (*create_sub_vnode)(fs_volume* volume, ino_t id, fs_vnode* vnode);
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status_t (*delete_sub_vnode)(fs_volume* volume, fs_vnode* vnode);
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};
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struct fs_vnode_ops {
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/* vnode operations */
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status_t (*lookup)(fs_volume* volume, fs_vnode* dir, const char* name,
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ino_t* _id);
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status_t (*get_vnode_name)(fs_volume* volume, fs_vnode* vnode, char* buffer,
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size_t bufferSize);
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status_t (*put_vnode)(fs_volume* volume, fs_vnode* vnode, bool reenter);
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status_t (*remove_vnode)(fs_volume* volume, fs_vnode* vnode, bool reenter);
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/* VM file access */
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bool (*can_page)(fs_volume* volume, fs_vnode* vnode, void* cookie);
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status_t (*read_pages)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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off_t pos, const iovec* vecs, size_t count, size_t* _numBytes);
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status_t (*write_pages)(fs_volume* volume, fs_vnode* vnode,
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void* cookie, off_t pos, const iovec* vecs, size_t count,
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size_t* _numBytes);
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/* asynchronous I/O */
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status_t (*io)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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io_request* request);
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status_t (*cancel_io)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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io_request* request);
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/* cache file access */
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status_t (*get_file_map)(fs_volume* volume, fs_vnode* vnode, off_t offset,
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size_t size, struct file_io_vec* vecs, size_t* _count);
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/* common operations */
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status_t (*ioctl)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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uint32 op, void* buffer, size_t length);
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status_t (*set_flags)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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int flags);
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status_t (*select)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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uint8 event, selectsync* sync);
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status_t (*deselect)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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uint8 event, selectsync* sync);
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status_t (*fsync)(fs_volume* volume, fs_vnode* vnode);
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status_t (*read_symlink)(fs_volume* volume, fs_vnode* link, char* buffer,
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size_t* _bufferSize);
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status_t (*create_symlink)(fs_volume* volume, fs_vnode* dir,
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const char* name, const char* path, int mode);
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status_t (*link)(fs_volume* volume, fs_vnode* dir, const char* name,
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fs_vnode* vnode);
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status_t (*unlink)(fs_volume* volume, fs_vnode* dir, const char* name);
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status_t (*rename)(fs_volume* volume, fs_vnode* fromDir,
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const char* fromName, fs_vnode* toDir, const char* toName);
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status_t (*access)(fs_volume* volume, fs_vnode* vnode, int mode);
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status_t (*read_stat)(fs_volume* volume, fs_vnode* vnode,
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struct stat* stat);
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status_t (*write_stat)(fs_volume* volume, fs_vnode* vnode,
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const struct stat* stat, uint32 statMask);
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status_t (*preallocate)(fs_volume* volume, fs_vnode* vnode,
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off_t pos, off_t length);
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/* file operations */
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status_t (*create)(fs_volume* volume, fs_vnode* dir, const char* name,
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int openMode, int perms, void** _cookie,
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ino_t* _newVnodeID);
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status_t (*open)(fs_volume* volume, fs_vnode* vnode, int openMode,
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void** _cookie);
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status_t (*close)(fs_volume* volume, fs_vnode* vnode, void* cookie);
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status_t (*free_cookie)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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status_t (*read)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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off_t pos, void* buffer, size_t* length);
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status_t (*write)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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off_t pos, const void* buffer, size_t* length);
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/* directory operations */
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status_t (*create_dir)(fs_volume* volume, fs_vnode* parent,
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const char* name, int perms);
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status_t (*remove_dir)(fs_volume* volume, fs_vnode* parent,
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const char* name);
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status_t (*open_dir)(fs_volume* volume, fs_vnode* vnode,
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void** _cookie);
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status_t (*close_dir)(fs_volume* volume, fs_vnode* vnode, void* cookie);
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status_t (*free_dir_cookie)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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status_t (*read_dir)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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struct dirent* buffer, size_t bufferSize, uint32* _num);
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status_t (*rewind_dir)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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/* attribute directory operations */
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status_t (*open_attr_dir)(fs_volume* volume, fs_vnode* vnode,
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void** _cookie);
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status_t (*close_attr_dir)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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status_t (*free_attr_dir_cookie)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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status_t (*read_attr_dir)(fs_volume* volume, fs_vnode* vnode,
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void* cookie, struct dirent* buffer, size_t bufferSize,
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uint32* _num);
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status_t (*rewind_attr_dir)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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/* attribute operations */
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status_t (*create_attr)(fs_volume* volume, fs_vnode* vnode,
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const char* name, uint32 type, int openMode,
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void** _cookie);
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status_t (*open_attr)(fs_volume* volume, fs_vnode* vnode, const char* name,
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int openMode, void** _cookie);
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status_t (*close_attr)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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status_t (*free_attr_cookie)(fs_volume* volume, fs_vnode* vnode,
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void* cookie);
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status_t (*read_attr)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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off_t pos, void* buffer, size_t* length);
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status_t (*write_attr)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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off_t pos, const void* buffer, size_t* length);
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status_t (*read_attr_stat)(fs_volume* volume, fs_vnode* vnode,
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void* cookie, struct stat* stat);
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status_t (*write_attr_stat)(fs_volume* volume, fs_vnode* vnode,
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void* cookie, const struct stat* stat, int statMask);
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status_t (*rename_attr)(fs_volume* volume, fs_vnode* fromVnode,
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const char* fromName, fs_vnode* toVnode, const char* toName);
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status_t (*remove_attr)(fs_volume* volume, fs_vnode* vnode,
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const char* name);
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/* support for node and FS layers */
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status_t (*create_special_node)(fs_volume* volume, fs_vnode* dir,
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const char* name, fs_vnode* subVnode, mode_t mode, uint32 flags,
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fs_vnode* _superVnode, ino_t* _nodeID);
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status_t (*get_super_vnode)(fs_volume* volume, fs_vnode* vnode,
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fs_volume* superVolume, fs_vnode* superVnode);
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/* lock operations */
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status_t (*test_lock)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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struct flock* lock);
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status_t (*acquire_lock)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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const struct flock* lock, bool wait);
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status_t (*release_lock)(fs_volume* volume, fs_vnode* vnode, void* cookie,
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const struct flock* lock);
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};
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struct file_system_module_info {
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struct module_info info;
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const char* short_name;
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const char* pretty_name;
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uint32 flags; // DDM flags
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/* scanning (the device is write locked) */
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float (*identify_partition)(int fd, partition_data* partition,
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void** _cookie);
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status_t (*scan_partition)(int fd, partition_data* partition,
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void* cookie);
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void (*free_identify_partition_cookie)(partition_data* partition,
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void* cookie);
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void (*free_partition_content_cookie)(partition_data* partition);
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/* general operations */
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status_t (*mount)(fs_volume* volume, const char* device, uint32 flags,
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const char* args, ino_t* _rootVnodeID);
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/* capability querying (the device is read locked) */
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uint32 (*get_supported_operations)(partition_data* partition, uint32 mask);
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bool (*validate_resize)(partition_data* partition, off_t* size);
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bool (*validate_move)(partition_data* partition, off_t* start);
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bool (*validate_set_content_name)(partition_data* partition,
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char* name);
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bool (*validate_set_content_parameters)(partition_data* partition,
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const char* parameters);
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bool (*validate_initialize)(partition_data* partition, char* name,
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const char* parameters);
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/* shadow partition modification (device is write locked) */
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status_t (*shadow_changed)(partition_data* partition,
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partition_data* child, uint32 operation);
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/* writing (the device is NOT locked) */
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status_t (*defragment)(int fd, partition_id partition,
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disk_job_id job);
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status_t (*repair)(int fd, partition_id partition, bool checkOnly,
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disk_job_id job);
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status_t (*resize)(int fd, partition_id partition, off_t size,
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disk_job_id job);
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status_t (*move)(int fd, partition_id partition, off_t offset,
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disk_job_id job);
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status_t (*set_content_name)(int fd, partition_id partition,
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const char* name, disk_job_id job);
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status_t (*set_content_parameters)(int fd, partition_id partition,
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const char* parameters, disk_job_id job);
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status_t (*initialize)(int fd, partition_id partition, const char* name,
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const char* parameters, off_t partitionSize, disk_job_id job);
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status_t (*uninitialize)(int fd, partition_id partition,
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off_t partitionSize, uint32 blockSize, disk_job_id job);
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};
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/* file system add-ons only prototypes */
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// callbacks for do_iterative_fd_io()
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typedef status_t (*iterative_io_get_vecs)(void* cookie, io_request* request,
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off_t offset, size_t size, struct file_io_vec* vecs,
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size_t* _count);
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typedef status_t (*iterative_io_finished)(void* cookie, io_request* request,
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status_t status, bool partialTransfer, size_t bytesTransferred);
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extern status_t new_vnode(fs_volume* volume, ino_t vnodeID, void* privateNode,
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fs_vnode_ops* ops);
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extern status_t publish_vnode(fs_volume* volume, ino_t vnodeID,
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void* privateNode, fs_vnode_ops* ops, int type,
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uint32 flags);
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extern status_t get_vnode(fs_volume* volume, ino_t vnodeID,
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void** _privateNode);
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extern status_t put_vnode(fs_volume* volume, ino_t vnodeID);
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extern status_t acquire_vnode(fs_volume* volume, ino_t vnodeID);
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extern status_t remove_vnode(fs_volume* volume, ino_t vnodeID);
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extern status_t unremove_vnode(fs_volume* volume, ino_t vnodeID);
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extern status_t get_vnode_removed(fs_volume* volume, ino_t vnodeID,
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bool* _removed);
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extern fs_volume* volume_for_vnode(fs_vnode* vnode);
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extern status_t check_access_permissions(int accessMode, mode_t mode,
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gid_t nodeGroupID, uid_t nodeUserID);
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extern status_t read_pages(int fd, off_t pos, const struct iovec* vecs,
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size_t count, size_t* _numBytes);
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extern status_t write_pages(int fd, off_t pos, const struct iovec* vecs,
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size_t count, size_t* _numBytes);
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extern status_t read_file_io_vec_pages(int fd,
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const struct file_io_vec* fileVecs, size_t fileVecCount,
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const struct iovec* vecs, size_t vecCount,
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uint32* _vecIndex, size_t* _vecOffset, size_t* _bytes);
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extern status_t write_file_io_vec_pages(int fd,
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const struct file_io_vec* fileVecs, size_t fileVecCount,
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const struct iovec* vecs, size_t vecCount,
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uint32* _vecIndex, size_t* _vecOffset, size_t* _bytes);
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extern status_t do_fd_io(int fd, io_request* request);
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extern status_t do_iterative_fd_io(int fd, io_request* request,
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iterative_io_get_vecs getVecs,
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iterative_io_finished finished, void* cookie);
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extern status_t notify_entry_created(dev_t device, ino_t directory,
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const char* name, ino_t node);
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extern status_t notify_entry_removed(dev_t device, ino_t directory,
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const char* name, ino_t node);
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extern status_t notify_entry_moved(dev_t device, ino_t fromDirectory,
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const char* fromName, ino_t toDirectory,
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const char* toName, ino_t node);
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extern status_t notify_stat_changed(dev_t device, ino_t node,
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uint32 statFields);
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extern status_t notify_attribute_changed(dev_t device, ino_t node,
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const char* attribute, int32 cause);
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extern status_t notify_query_entry_created(port_id port, int32 token,
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dev_t device, ino_t directory, const char* name,
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ino_t node);
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extern status_t notify_query_entry_removed(port_id port, int32 token,
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dev_t device, ino_t directory, const char* name,
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ino_t node);
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extern status_t notify_query_attr_changed(port_id port, int32 token,
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dev_t device, ino_t directory, const char* name,
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ino_t node);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FS_INTERFACE_H */
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